<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>订单管理</el-breadcrumb-item>
      <el-breadcrumb-item>订单列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片试图区域 -->
    <el-card>
      <!-- 提示区域 -->
      <el-alert title="添加商品信息" type="info" show-icon :closable="false" center></el-alert>
      <!-- 步骤条区域 -->
      <el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          :tab-position="'left'"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                :options="cateList"
                :props="cateProps"
                @change="handleChange"
                v-model="addForm.goods_cat"
                clearable
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的item项 -->
            <el-form-item :label="item.attr_name" v-for="item in manyTabData" :key="item.attr_id">
              <!-- 复选框 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals " :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTabData" :key="item.arrr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action:表示图片要上传到的后台API地址 -->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 -->
            <quill-editor v-model="addForm.goods_introduce" ref="myQuillEditor"></quill-editor>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览对话框 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt class="previewImg" />
    </el-dialog>
    <!-- 添加商品的按钮 -->
    <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
  </div>
</template>


<script>
import _ from 'lodash'
export default {
  data() {
    return {
      activeIndex: 0,
      //   添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        //商品所属的分类数组
        goods_cat: [],
        //图片的数组
        pics: [],
        // 商品的详情描述
        goods_introduce: '',
        //动态参数和静态属性的数组
        attrs: []
      },
      //表单校验规则
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', tirgger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', tirgger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', tirgger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', tirgger: 'blur' }
        ]
        /* goods_cat: [
          { required: true, message: '请选择商品分类', tirgger: 'blur' }
        ] */
      },
      //商品分类列表
      cateList: [],
      //配置级联选择器
      cateProps: {
        value: 'cat_id',
        label: 'cat_name',
        children: 'children',
        expandTrigger: 'hover'
      },
      //动态参数列表数据
      manyTabData: [],
      //静态属性列表数据
      onlyTabData: [],
      //上传图片的URL地址
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      //图片上传组件headers请求头对象
      headerObj: { Authorization: window.sessionStorage.getItem('token') },
      //图片预览路径
      previewPath: '',
      previewVisible: false
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    //获取所有商品分类数据
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status != 200) {
        return this.$message.error('获取商品分类数据失败')
      }
      this.cateList = res.data
      //   console.log(this.cateList)
    },
    //级联选择器变化会触发的函数
    handleChange() {
      console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    //标签切换值触发这个事件
    beforeTabLeave(activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message({
          message: '请先选择商品分类！',
          type: 'error'
        })
        return false
      }
    },

    async tabClicked() {
      //证明访问的是动态参数面板
      //   console.log(this.activeIndex)
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message({
            message: '获取动态参数失败',
            type: 'error'
          })
        }
        // console.log(res.data)
        //将字符串切割转化为数组
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTabData = res.data
      } else if (this.activeIndex === '2') {
        //证明访问的是静态属性面板
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'only' }
          }
        )
        if (res.meta.status !== 200) {
          return this.$message({
            message: '获取静态属性失败',
            type: 'error'
          })
        }
        // console.log(res.data)
        this.onlyTabData = res.data
      }
    },
    //处理图片预览效果
    handlePreview(file) {
      console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    //处理移除图片的操作
    handleRemove(file) {
      console.log(file)
      //将图片的信息对象从pics数组中移除
      const filePath = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm)
    },
    //监听图片上传成功的事件
    handleSuccess(response) {
      console.log(response)
      //拼接得到一个图片信息对象
      const picInfo = { pic: response.data.tmp_path }
      //将图片信息push到pics图片数组中
      this.addForm.pics.push(picInfo)
      console.log(this.addForm)
    },
    // 添加商品
    add() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message({
            message: '请填写必要的表单项目!',
            type: 'error'
          })
        }
        //执行添加的业务逻辑
        //深拷贝
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyTabData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTabData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          form.attrs = this.addForm.attrs
          this.addForm.attrs.push(newInfo)
        })
        //发起请求添加商品
        //商品的名称必须是唯一的
        const { data: res } = await this.$http.post('goods', form)
        if(res.meta.status!==201){
           return this.$message({
                message: '添加商品失败!',
                type: 'info'
            });
        }
        this.$message({
            message: '添加商品成功!',
            type: 'success'
        });
        this.$router.push('/goods')
        // console.log(form)
      })
    }
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
</style>